RE: What are the different schema languages?
> -----Original Message----- > From: Bryce K. Nielsen [mailto:bryce@s...] > Sent: Wednesday, January 22, 2003 12:15 > To: xml-dev@l... > Subject: What are the different schema languages? > > > I'm trying to compile a list of all the different XML schema > languages and their specifications out there and can only > think of a handful: > > - XML 1.0 Document Type Definition (DTD) found at > http://www.w3.org/XML/1998/06/xmlspec-report-19980910.htm > - W3C's XML Schema Definition (WXS or XSD) found at http://www.w3.org/XML/Schema > - Oasis' RELAX NG found at http://www.oasis-open.org/committees/relax-ng/ > - Microsoft's XML Data Reduced schema (XDR) found at > >http://msdn.microsoft.com/library/default.asp?url=/library/en-us/xmlsdk 30/ht > m/xmconxmlschemadevelopersguide.asp > > Are there any others that I am unaware of? ASN.1. The new XML Encoding Rules of ASN.1 are being finalized by the joint ISO/IEC/ITU-T standards group. Publication is expected within a few months. The language allows the specification of schemas for a wide range of XML documents. It takes a different view from other schema languages, in that it is based on the definition of an abstract data structure, whose "values" are *encoded* in XML. One benefit of this model is that the "information content" of an XML document described by an ASN.1 schema can be immediately encoded in any of the standard binary Encoding Rules of ASN.1 (such as BER, DER, or PER) with no effort, as an alternative to XML itself, whenever size is a concern. ASN.1 tools are currently being updated to support the new XML Encoding Rules. For application developers having some familiarity with ASN.1, creating or processing an XML document from an ASN.1-based application will be as easy as creating or processing a BER message or a PER message. For information on ASN.1, see http://asn1.elibel.tm.fr/ Alessandro Triglia OSS Nokalva www.oss.com -BKN ----------------------------------------------------------------- The xml-dev list is sponsored by XML.org <http://www.xml.org>, an initiative of OASIS <http://www.oasis-open.org> The list archives are at http://lists.xml.org/archives/xml-dev/ To subscribe or unsubscribe from this list use the subscription manager: <http://lists.xml.org/ob/adm.pl>
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